In frogs, which stage is characterized by gills?

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Study for the Academic Decathlon Science Test with expert-curated flashcards and multiple-choice questions. Enhance your understanding with clear hints and explanations. Prepare for success on your exam!

Multiple Choice

In frogs, which stage is characterized by gills?

Explanation:
Gills appear during the frog’s aquatic larval stage, when the animal is a tadpole. Tadpoles hatch from eggs in water and rely on gills to exchange gases as they swim with a tail. As they undergo metamorphosis, they develop legs and lungs and lose their gills, becoming adults. So the stage characterized by gills is the tadpole stage.

Gills appear during the frog’s aquatic larval stage, when the animal is a tadpole. Tadpoles hatch from eggs in water and rely on gills to exchange gases as they swim with a tail. As they undergo metamorphosis, they develop legs and lungs and lose their gills, becoming adults. So the stage characterized by gills is the tadpole stage.

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